Genian NAC 5.0.75 LTS Release: Improper Access Control
CVE-2026-76142 is a critical-severity improper access control vulnerability in Genian NAC 5.0.75 LTS Release from Genians, with a CVSS 4.0 base score of 9.3 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 148667 as the first without the flaw, so updating Genian NAC 5.0.75 LTS Release to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.43% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Genian NAC 5.0.75 LTS Release to 148667 or a later version.
- Update Genian NAC 5.0.85 Release Stable to 148666 or a later version.
- Update Genian NAC 5.0.86 Release to 148665 or a later version.
- Read the advisory on github.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Genians | Genian NAC 5.0.75 LTS Release | 135823 up to, but not including, 148667 | 148667 |
| Genians | Genian NAC 5.0.85 Release Stable | 147181 up to, but not including, 148666 | 148666 |
| Genians | Genian NAC 5.0.86 Release | 148018 up to, but not including, 148665 | 148665 |
| Genians | Genian ZTNA 6.0.35 LTS Release | 135814 up to, but not including, 148672 | 148672 |
| Genians | Genian ZTNA 6.0.45 Release Stable | 147169 up to, but not including, 148671 | 148671 |
| Genians | Genian ZTNA 6.0.46 Release | 148028 up to, but not including, 148670 | 148670 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Attack requirements
- NoneThe attack does not depend on a particular deployment or configuration.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Confidentiality (vulnerable system)
- LowLimited loss of confidentiality on the vulnerable system.
- Integrity (vulnerable system)
- HighSerious loss of integrity on the vulnerable system.
- Availability (vulnerable system)
- HighSerious loss of availability on the vulnerable system.
- Confidentiality (other systems)
- LowLimited loss of confidentiality on systems beyond the vulnerable one.
- Integrity (other systems)
- HighSerious loss of integrity on systems beyond the vulnerable one.
- Availability (other systems)
- HighSerious loss of availability on systems beyond the vulnerable one.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. Scored by CNA (krcert.or.kr).
Official description
Insufficient authentication and access control on the internal-only IPC SOAP endpoint of the Genian NAC/ZTNA policy server allows an unauthenticated attacker to invoke internal functions
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Access Control
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
How developers prevent this class of flaw
- Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
References
Other references
Recent Improper Access Control vulnerabilities
- 7.5 High severity
- 7.2 High severity
- 9.8 Critical severity
- 9.4 Critical severity
- 8.6 High severity
- 7.1 High severity
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